The new driver has the same effect. After several tests I found the reason for this behavior. Is the color-depth. With 16 bit the error occured, with 24 bit not. BUT, I can see in the glxgears-window only fragments of the gears. I cannot understand this. With the ver. 10.2 of Suse it works and now with the 11.0 no longer. Are so many changes from 2.6.18 to 2.6.25 kernel or is it a matrox problem? Can anybody validate this problem?